I have a 02+ LS6 MAF that has been descreened (not ported/hacked up/etc....just descreened). I used an LS1Edit file for a 02 Z06 to see what the stock MAF table should be. I then copied that information into my MAF table for my F-body. Now I need to know:

with the MAF descreened, do I need to do any scaling of the stock 02 Z06 MAF table?


I was told "somewhere" (don't remember where I heard it) that the Z06 comes with the MAF already descreened. Is this true? If so then I should not have to mess with the MAF table right?

 

The 02 LS6 MAF is descreened from the factory. Just use a stock 02 Z06 MAF cal and you will be fine.

 

good deal.....well at least there is one thing that I don't have to worry about

 

If anyone has that ('02 Z06) table handy, I'd
like to add it to my collection. I'm using a truck
MAF w/ the screen popped, and a truck table
right now.

 

I'll second that request

 

I'm guessing that the smart move is to actually buy a ZO6 MAF and use the ZO6 table for its calibration. Correct?

 

yep....

 

There was a post on one of the boards by someone who'd actually measured the flow rate reported by the maf with screen vs. without screen, and found no difference. (Straight thru air flow, no bends.) I think the screen maybe just heats up the incoming air (not a good thing).

 

Well, I've measured the pressure drop across a screened
and a descreened truck MAF (I have both and ran them
simultaneously, in a tandem tube) and there was a measurable
difference in pressure drop, but negligible difference in the
output frequency. So I'd agree with this (if it wasn't me
you're talking about in the first place).

But I have several different cal tables from different vehicle
types, all the same base 85mm Delphi MAF, that differ by
several percent. So I believe GM "throws all of the intake
tract errors onto the MAF table" and since my car is "none
of the above" I want to get as many examples as possible,
to kind of draw a chalk line around the body.